Sector Lights, ContinuedSector Lights,continuedOn either side of the line of demarcation between colored and whitesectors, there is always a small sector whose color is doubtful becausethe edges of a sector cannot be cut off sharply. Under someatmospheric conditions, a white light may have a reddish appearance.Consequently, light sectors must not be relied upon entirely; but positionmust be verified repeatedly by bearings taken on the light itself or byother fixed objects.When a light is cut off (obscured) by adjoining land, the arc of visibilitymay vary with a ships distance away from the light. If the interveningland is sloping, for example, the light may be visible over a wider arcfrom a far off ship than from one close inshore.EmergencyLightsEmergency lights of reduced intensity are displayed from many primarylights when the main light is extinguished. These emergency lights mayor may not have the same characteristic as the main light. Thecharacteristic of the emergency lights are listed in column 8 of the LightList. Again, refer to the example shown in figure 4-9 for Cape HenryLight (LLNR 365).RACONsA RACON is a radar beacon that produces a coded response, or radarpaint, when triggered by a radar signal. The coded response appears onyour radar screen as a series of dots and dashes. RACONs are placedon important ATONs (buoys or structures) to assist in positiveidentification of the aid. Column 8 of the Light List will describe theRACON signal both as a Morse code letter and the equivalent dots anddashes, for example RACON: X (-..-).4-22